Snippets tagged design patterns
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Chain of responsibility
The following sample wants to make sure the person’s age is between 18 and 65, weight is no more than 200 and tall enough (>120).
82 people like this
Like the snippet!Posted: 13 years ago by Tao Liu
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Observer pattern
Observer pattern in F#
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Like the snippet!Posted: 13 years ago by Tao Liu
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State Pattern
the interest rate is decided by the internal state: account balance
34 people like this
Like the snippet!Posted: 13 years ago by Tao Liu
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Command pattern for Redo-Undo
Command pattern for redo-undo scenario.
47 people like this
Like the snippet!Posted: 13 years ago by Tao Liu
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Singleton Pattern
singleton pattern in F#
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Like the snippet!Posted: 13 years ago by Tao Liu
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Proxy Pattern
Proxy pattern is a class functioning as an interface to something else.
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Like the snippet!Posted: 13 years ago by Tao Liu
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Command pattern for Redo-Undo II
This command redo-undo implement group the command under Do/Undo category.
70 people like this
Like the snippet!Posted: 13 years ago by Tao Liu
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F# Strategy Pattern
Implementing the strategy pattern by putting all the strategies as a static member function for a class that can't be instantiated like the singleton
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Like the snippet!Posted: 11 years ago by Evanescent Devil
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F# Factory Pattern
Factory Pattern
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Like the snippet!Posted: 11 years ago by Evanescent Devil
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Decorate pattern
implement the decorate pattern in F#. The decorate pattern is to add new featuures to an object at runtime.
36 people like this
Like the snippet!Posted: 13 years ago by Tao Liu
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Strategy pattern
Strategy pattern in F#
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Like the snippet!Posted: 13 years ago by Tao Liu
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Adapter pattern
Invoke the methods from incompatible types
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Like the snippet!Posted: 13 years ago by Tao Liu
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Composite pattern and Visitor Pattern
use composite pattern to construct a tree and visitor pattern to bring back the traverse result.
34 people like this
Like the snippet!Posted: 13 years ago by Tao Liu
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Factory Pattern
Factory pattern in F#
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Like the snippet!Posted: 13 years ago by Tao Liu
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Chain of responsibility II
Unlike the previous chain of responsibility, this version use the pipeline to chain responsibilities.
104 people like this
Like the snippet!Posted: 13 years ago by Tao Liu
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Template pattern
Template pattern is a behavior-based pattern. Realized the importance of high order function, this is a way to use high order function. Still keep the type structure to organize my code.
38 people like this
Like the snippet!Posted: 13 years ago by Tao Liu
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F# Decorator Pattern
Decorator Pattern
2 people like this
Like the snippet!Posted: 11 years ago by Evanescent Devil
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F# Observer Pattern
Observer Pattern
2 people like this
Like the snippet!Posted: 11 years ago by Evanescent Devil